/**
* mft.c - NTFS kernel mft record operations. Part of the Linux-NTFS project.
*
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2005 Anton Altaparmakov
* Copyright (c) 2002 Richard Russon
*
* This program/include file is free software; you can redistribute it and/or
ntfs_volume *vol = ni->vol;
struct inode *mft_vi = vol->mft_ino;
struct page *page;
- unsigned long index, ofs, end_index;
+ unsigned long index, end_index;
+ unsigned ofs;
BUG_ON(ni->page);
/*
* overflowing the unsigned long, but I don't think we would ever get
* here if the volume was that big...
*/
- index = ni->mft_no << vol->mft_record_size_bits >> PAGE_CACHE_SHIFT;
+ index = (u64)ni->mft_no << vol->mft_record_size_bits >>
+ PAGE_CACHE_SHIFT;
ofs = (ni->mft_no << vol->mft_record_size_bits) & ~PAGE_CACHE_MASK;
i_size = i_size_read(mft_vi);
}
unmap_mft_record(ni);
ntfs_error(base_ni->vol->sb, "Found stale extent mft "
- "reference! Corrupt file system. "
+ "reference! Corrupt filesystem. "
"Run chkdsk.");
return ERR_PTR(-EIO);
}
/* Verify the sequence number if it is present. */
if (seq_no && (le16_to_cpu(m->sequence_number) != seq_no)) {
ntfs_error(base_ni->vol->sb, "Found stale extent mft "
- "reference! Corrupt file system. Run chkdsk.");
+ "reference! Corrupt filesystem. Run chkdsk.");
destroy_ni = TRUE;
m = ERR_PTR(-EIO);
goto unm_err_out;
} while (bh);
tail->b_this_page = head;
attach_page_buffers(page, head);
- BUG_ON(!page_has_buffers(page));
}
bh = head = page_buffers(page);
BUG_ON(!bh);
LCN lcn;
unsigned int vcn_ofs;
+ bh->b_bdev = vol->sb->s_bdev;
/* Obtain the vcn and offset of the current block. */
vcn = ((VCN)mft_no << vol->mft_record_size_bits) +
(block_start - m_start);
*/
if (!NInoTestClearDirty(ni))
goto done;
- BUG_ON(!page_has_buffers(page));
bh = head = page_buffers(page);
BUG_ON(!bh);
rl = NULL;
LCN lcn;
unsigned int vcn_ofs;
+ bh->b_bdev = vol->sb->s_bdev;
/* Obtain the vcn and offset of the current block. */
vcn = ((VCN)ni->mft_no << vol->mft_record_size_bits) +
(block_start - m_start);
na.name_len = 0;
na.type = AT_UNUSED;
/*
- * For inode 0, i.e. $MFT itself, we cannot use ilookup5() from here or
- * we deadlock because the inode is already locked by the kernel
- * (fs/fs-writeback.c::__sync_single_inode()) and ilookup5() waits
- * until the inode is unlocked before returning it and it never gets
- * unlocked because ntfs_should_write_mft_record() never returns. )-:
- * Fortunately, we have inode 0 pinned in icache for the duration of
- * the mount so we can access it directly.
+ * Optimize inode 0, i.e. $MFT itself, since we have it in memory and
+ * we get here for it rather often.
*/
if (!mft_no) {
/* Balance the below iput(). */
vi = igrab(mft_vi);
BUG_ON(vi != mft_vi);
- } else
- vi = ilookup5(sb, mft_no, (test_t)ntfs_test_inode, &na);
+ } else {
+ /*
+ * Have to use ilookup5_nowait() since ilookup5() waits for the
+ * inode lock which causes ntfs to deadlock when a concurrent
+ * inode write via the inode dirty code paths and the page
+ * dirty code path of the inode dirty code path when writing
+ * $MFT occurs.
+ */
+ vi = ilookup5_nowait(sb, mft_no, (test_t)ntfs_test_inode, &na);
+ }
if (vi) {
ntfs_debug("Base inode 0x%lx is in icache.", mft_no);
/* The inode is in icache. */
na.mft_no = MREF_LE(m->base_mft_record);
ntfs_debug("Mft record 0x%lx is an extent record. Looking for base "
"inode 0x%lx in icache.", mft_no, na.mft_no);
- vi = ilookup5(sb, na.mft_no, (test_t)ntfs_test_inode, &na);
+ if (!na.mft_no) {
+ /* Balance the below iput(). */
+ vi = igrab(mft_vi);
+ BUG_ON(vi != mft_vi);
+ } else
+ vi = ilookup5_nowait(sb, na.mft_no, (test_t)ntfs_test_inode,
+ &na);
if (!vi) {
/*
* The base inode is not in icache, write this extent mft
/*
* Determine the last lcn of the mft bitmap. The allocated size of the
* mft bitmap cannot be zero so we are ok to do this.
- * ntfs_find_vcn() returns the runlist locked on success.
*/
+ down_write(&mftbmp_ni->runlist.lock);
read_lock_irqsave(&mftbmp_ni->size_lock, flags);
ll = mftbmp_ni->allocated_size;
read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
- rl = ntfs_find_vcn(mftbmp_ni, (ll - 1) >> vol->cluster_size_bits, TRUE);
+ rl = ntfs_attr_find_vcn_nolock(mftbmp_ni,
+ (ll - 1) >> vol->cluster_size_bits, NULL);
if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) {
+ up_write(&mftbmp_ni->runlist.lock);
ntfs_error(vol->sb, "Failed to determine last allocated "
"cluster of mft bitmap attribute.");
- if (!IS_ERR(rl)) {
- up_write(&mftbmp_ni->runlist.lock);
+ if (!IS_ERR(rl))
ret = -EIO;
- } else
+ else
ret = PTR_ERR(rl);
return ret;
}
up_write(&vol->lcnbmp_lock);
ntfs_unmap_page(page);
/* Allocate a cluster from the DATA_ZONE. */
- rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE);
+ rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE,
+ TRUE);
if (IS_ERR(rl2)) {
up_write(&mftbmp_ni->runlist.lock);
ntfs_error(vol->sb, "Failed to allocate a cluster for "
BUG_ON(ll < rl2->vcn);
BUG_ON(ll >= rl2->vcn + rl2->length);
/* Get the size for the new mapping pairs array for this extent. */
- mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll);
+ mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1);
if (unlikely(mp_size <= 0)) {
ntfs_error(vol->sb, "Get size for mapping pairs failed for "
"mft bitmap attribute extent.");
// TODO: Deal with this by moving this extent to a new mft
// record or by starting a new extent in a new mft record or by
// moving other attributes out of this mft record.
+ // Note: It will need to be a special mft record and if none of
+ // those are available it gets rather complicated...
ntfs_error(vol->sb, "Not enough space in this mft record to "
"accomodate extended mft bitmap attribute "
"extent. Cannot handle this yet.");
/* Generate the mapping pairs array directly into the attr record. */
ret = ntfs_mapping_pairs_build(vol, (u8*)a +
le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
- mp_size, rl2, ll, NULL);
+ mp_size, rl2, ll, -1, NULL);
if (unlikely(ret)) {
ntfs_error(vol->sb, "Failed to build mapping pairs array for "
"mft bitmap attribute.");
a->data.non_resident.mapping_pairs_offset),
old_alen - le16_to_cpu(
a->data.non_resident.mapping_pairs_offset),
- rl2, ll, NULL)) {
+ rl2, ll, -1, NULL)) {
ntfs_error(vol->sb, "Failed to restore mapping pairs "
"array.%s", es);
NVolSetErrors(vol);
* Determine the preferred allocation location, i.e. the last lcn of
* the mft data attribute. The allocated size of the mft data
* attribute cannot be zero so we are ok to do this.
- * ntfs_find_vcn() returns the runlist locked on success.
*/
+ down_write(&mft_ni->runlist.lock);
read_lock_irqsave(&mft_ni->size_lock, flags);
ll = mft_ni->allocated_size;
read_unlock_irqrestore(&mft_ni->size_lock, flags);
- rl = ntfs_find_vcn(mft_ni, (ll - 1) >> vol->cluster_size_bits, TRUE);
+ rl = ntfs_attr_find_vcn_nolock(mft_ni,
+ (ll - 1) >> vol->cluster_size_bits, NULL);
if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) {
+ up_write(&mft_ni->runlist.lock);
ntfs_error(vol->sb, "Failed to determine last allocated "
"cluster of mft data attribute.");
- if (!IS_ERR(rl)) {
- up_write(&mft_ni->runlist.lock);
+ if (!IS_ERR(rl))
ret = -EIO;
- } else
+ else
ret = PTR_ERR(rl);
return ret;
}
nr > min_nr ? "default" : "minimal", (long long)nr);
old_last_vcn = rl[1].vcn;
do {
- rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE);
+ rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE,
+ TRUE);
if (likely(!IS_ERR(rl2)))
break;
if (PTR_ERR(rl2) != -ENOSPC || nr == min_nr) {
return PTR_ERR(rl);
}
mft_ni->runlist.rl = rl;
- ntfs_debug("Allocated %lli clusters.", nr);
+ ntfs_debug("Allocated %lli clusters.", (long long)nr);
/* Find the last run in the new runlist. */
for (; rl[1].length; rl++)
;
BUG_ON(ll < rl2->vcn);
BUG_ON(ll >= rl2->vcn + rl2->length);
/* Get the size for the new mapping pairs array for this extent. */
- mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll);
+ mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1);
if (unlikely(mp_size <= 0)) {
ntfs_error(vol->sb, "Get size for mapping pairs failed for "
"mft data attribute extent.");
// moving other attributes out of this mft record.
// Note: Use the special reserved mft records and ensure that
// this extent is not required to find the mft record in
- // question.
+ // question. If no free special records left we would need to
+ // move an existing record away, insert ours in its place, and
+ // then place the moved record into the newly allocated space
+ // and we would then need to update all references to this mft
+ // record appropriately. This is rather complicated...
ntfs_error(vol->sb, "Not enough space in this mft record to "
"accomodate extended mft data attribute "
"extent. Cannot handle this yet.");
/* Generate the mapping pairs array directly into the attr record. */
ret = ntfs_mapping_pairs_build(vol, (u8*)a +
le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
- mp_size, rl2, ll, NULL);
+ mp_size, rl2, ll, -1, NULL);
if (unlikely(ret)) {
ntfs_error(vol->sb, "Failed to build mapping pairs array of "
"mft data attribute.");
NVolSetErrors(vol);
return ret;
}
- a = ctx->attr;
- a->data.non_resident.highest_vcn = cpu_to_sle64(old_last_vcn - 1);
+ ctx->attr->data.non_resident.highest_vcn =
+ cpu_to_sle64(old_last_vcn - 1);
undo_alloc:
- if (ntfs_cluster_free(vol->mft_ino, old_last_vcn, -1) < 0) {
+ if (ntfs_cluster_free(mft_ni, old_last_vcn, -1, ctx) < 0) {
ntfs_error(vol->sb, "Failed to free clusters from mft data "
"attribute.%s", es);
NVolSetErrors(vol);
}
+ a = ctx->attr;
if (ntfs_rl_truncate_nolock(vol, &mft_ni->runlist, old_last_vcn)) {
ntfs_error(vol->sb, "Failed to truncate mft data attribute "
"runlist.%s", es);
NVolSetErrors(vol);
}
- if (mp_rebuilt) {
+ if (mp_rebuilt && !IS_ERR(ctx->mrec)) {
if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
a->data.non_resident.mapping_pairs_offset),
old_alen - le16_to_cpu(
a->data.non_resident.mapping_pairs_offset),
- rl2, ll, NULL)) {
+ rl2, ll, -1, NULL)) {
ntfs_error(vol->sb, "Failed to restore mapping pairs "
"array.%s", es);
NVolSetErrors(vol);
}
flush_dcache_mft_record_page(ctx->ntfs_ino);
mark_mft_record_dirty(ctx->ntfs_ino);
+ } else if (IS_ERR(ctx->mrec)) {
+ ntfs_error(vol->sb, "Failed to restore attribute search "
+ "context.%s", es);
+ NVolSetErrors(vol);
}
if (ctx)
ntfs_attr_put_search_ctx(ctx);
"reports this as corruption, please email "
"linux-ntfs-dev@lists.sourceforge.net stating "
"that you saw this message and that the "
- "modified file system created was corrupt. "
+ "modified filesystem created was corrupt. "
"Thank you.");
}
/* Set the update sequence number to 1. */